Feeding mechanism for sewing-machines.



L. ONDERDONK.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION IILED JUNE 3, 1904.

1,1 15,096. Patented Oct. 27, 1914.

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L. ONDERDONK. FEEDING MECHANISM FOR SEWING MACHINES. APPLIGATiQlLFILEDJUNE 3, 1904,

1,1 1 5,096. Patented 001;. 27, 1914.

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LAMSINGONDERDONK, .OF NEW YORK, N. Y., ASSIGNOB. '110 UNION SPECIALMACHINE .OOMPANY, OF CHICAGO, ILLINOIS, A. CORPORATION OF ILLINOIS.

FEEDING MECHANISM FOBfiEWVING-MACHINES.

Tamil whom itmay concern Be it known ilihtlt 'I, LANSING QNDERDoNK,

a .citizen of the United States, residing at New York, Manhattanborough, in the county of New York, State of New York,

have invented certain new and useful 1mprovements in Feeding Mechanismfor Sewing-Machines, of which the following is a description, referencebeing had to the ac companying drawing and to the letters and figures ofreference marked thereon. My invention relates to improvements infeeding devices for sewing machines. So far ascertain portions of thefeed are con cerned, the arrangement is the same as shown on the UnionSpecial interlock machine, which feed is illustrated in detail-in thepatent granted to Russel G. Woodward on the 24th day of October, 1905,No. 802,189, said patent relating .to an arrange ment of an inclinedpivoted feed dog with centain adjustment dor shifting the feed dog .onits pivot to vary the angle of inclination at which it engages and feedsthe goods. llhis arrangement of inclined feed dog is for-the purpose ofcrowding a portionof the goods advance of the ,needle up to the same,thereby preventing puckering of the fabric aiitcr :the stitches havebeen placed therein.

The present invention embodies in the main, an additional feature forvarying the height off said pivoted feed dog, whereby a greater .or lessamount of cfeeding surface thereof may, in the upward movement of saidfeed dog comeabove the surface of the cloth plate.

The invention therefore, consists in the matters hereinatter describedand referred 4.0 to in the appended claims.

It is illustrated in the accompanying drawings, in which-- Figure :1 isa perspective view looking toward the front of the machine of a por tionof the sewing machine embodying my invention; Fig. 2 is a transversesection through the machine, showing the feeding mechanism and the meansfor adjusting the feed dog in side elevation. transverse section showingthe feed dog and .feedbar from theopposite side from Fig. 2, withcertain parts :in section to show the vertical adjusting device. Fig. 4:is a front view of a portion of the sewing machine with the parts brokenaway illustrating the Specification of Letters Patent.

Application filed June 3. 1.904.

thereof varied.

Fig. 8 is a' Patented Oct. 27. 1914. S ahNo. 211,066.

eccentric arrangement for imparting the forward and backward movement tothe rt'eed dog; Fig. 5 is a sectional view illustrating the eccentricwhich imparts movement to the feed dog and illustrating also theiilanged disk secured on the main shafit to rwhich .said. eccentric isadjustably 00nnocted. 1Fig=6 is a cross section illustrating details ofsaid adjustment.

In these drawings, A represents a portion of ithe. bed plate of a sewingmachine embodying the invention; 13, is the needle bar; G, the presserbar; 1D the presser foot; E the cloth ,plate; F the driving shatt.

The feeding mechanism hereinshow-n, includes a sfeed-Ibar which -is made:in two parts a and a. The feed bar a is pivoted to the rocking frame I.Said feed bar carries the usual (fork i, the lower flange of which 70,engages the under side of a cam Kon which the deed !bar .6 rests. As thecam K is notated 'hy the main shaft F, the l'feed bar e will 'be movedup and down. The rocking firame il connected by meansof 'a dink I withthe eccentric strap (i, which 006perates with the eccentric G on 'themain shaft. Said eccentric G is adjustably connected to the flangedcollar H, which in turn is secured to :the shaft 1*. The eccentric (itas herein shown is secured 'to the flange of the collar H by means ofbolts, (1,

c .llhe bolt a passcsthrough a slot =1), in a flange carrying theeccentric. The opening through the eccentric is slightly larger than-thediameter of the main shaft, so that by loosening the bolt (1, theeccentric may'be shifted laterally of the shaiit and the throw Theportion 6 of the feed bar is also pivoted to the rocking iir ame I andis adjustahly secured :to the portion e of the rfeod bar by means .ofthe screw stud 'L. The feed bar 0 ispivoted tolthe feed bar 6 'by apivot pin d,.and at its lowerend has a vertical slot connection 1'',with aroundedhead g on the end of :the rod 71., which is screw threadedinto .a sleeve carried by the upper portion of the "fork 2'. By turningthe rod 1 it will be noted that the angle of inclination of the (feeddog 0 is varied. This means of adjustment is substantially the same asthat shownin the patent of Woodward above referred to.

To provide for a vertical adjustment of the iced dog to vary the amountof feeding surface with which the goods are engaged,

the upper feed bar 6 which carries the feed dog 0, is provided with anopening m, through which passes a screw stud L, which at its lower endscrews into the lower feed bar Z. This screw stud L passes through aplate M secured by screwsnto the upper feed bar 6 and carries betweenthe plate M and the lower feed bar 6 the collar 0 which as the screw Lis turned to withdraw it from the bar Z will bear against the plate Mand positively raise the upper feed bar 6- and thereafter the feed doga. Thisis permitted by means of the vertical slot connection between theball 9 and the lower end of the pivoted dog a. This screw L has itsupper end substantially flush with the top of the cloth plate extendinginto an opening in the same, so that it is readily accessible to theoperator for adjustment. I have herein shown the forward part of thefeed dog as provided with a limited number of teeth which are arrangedon a. downwardly curved or inclined surface, the purpose of this beingto prevent the fabric when placed in the machine, from striking againstthe wall of the feed dog. This, however, is not of my inven' tion, and Ido not claim the same. it will readily be seen that by adjusting thevertical position of the feed dog 0 relative to the work support, that agreater or less amount of the feed dog will engage the material inadvance of the needle before the feeding stroke takes place, andthereby, the amount of gathering in of the material, may be varied. 4

Having thus described my invention, what ll claim and desire to secureby Letters Patent is 1. A feeding mechanism for sewingmachinescomprising a feed bar, a feed dog pivoted thereto on an axistransverse to the direction of feed, means for adjusting said feed dogon said axis to vary the angle of inclination at which said dog engagesthe goods, and means for positively adjusting the .feed bar verticallyto vary the amount of feeding surface with which the goods are engaged,substantially as described.

2. The combination with a supporting bar, and upper feeding bar, a feedclog pivoted to the upper feed bar with means for adjusting the angle ofinclination at which it engages the goods, of means for posi tivelyadjusting the same vertically, comprising a screw secured to thesupporting bar, and passing through the upper feeding bar withconnections between said screw and the upper feeding bar to cause thesame to be moved vertically as the screw is turned, substantially asdescribed.

3. In a feeding mechanism for sewing machines, comprising two feed barspivoted upon a common frame, the upper one resting upon the lower, afeed deg pivoted to the upper bar and means for swinging the feed dog011 its pivot to vary its angle of inclination and means for adjustingthe upper feed bar with respect to thelower, and means for operatingsaid common frame substantially as described.

-:l. in a feeding mechanism for sewing machines, comprising two feedbars pivoted upon a common frame, and the upper one resting upon thelower, a feed dog pivoted to the upper bar and means for swinging thefeed dog on its pivot to vary its angle of inclination and means foradjusting the upper feed bar with respect to the lower, comprising ascrew stud passing through the upper feed bar and into the lower, aplate surrounding said screw stud and secured to the upper feed bar anda collar upon said screw stud bearing at its upper surface upon theunder side of said plate, and means for operating said common framesubstantially as described.

In a feeding mechanism for sewing machines, comprising two feed bars, afeed dog pivoted to the upper bar, and means for swinging the feed dogon its pivot to vary its angle of inclination, and means for ad justingthe upper feed bar with respect to the lower; means for supporting andoperating the feed bars substantially as described.

6. In a feeding mechanism for sewing machines, comprising two feed barspivoted upon a common frame, and the upper one resting upon the lower,means for operating said common frame a feed dog pivoted to the upperbar, and means for swinging the feed dog on its pivot to vary its angleof inclination, and means for-adjusting the upper feed bar with respectto the lower, comprising a screw stud passing through the upper feed barand into the lower, a plate surroundin said-screw stud and secured tothe upper feed bar and a collar upon said screw stud bearing at itsupper surface upon the under side of said plate.

7 The combination with a work support, of a feeding mechanism includinga two part feed bar, a feed dog carried by one of said parts, said feeddog having a feeding surface downwardly and rearwardly inclined in theline of feed relative to the work support, means for varying the angleof the feed dog relative to the work support, means for adjusting thefeed dog and one part of the feed bar relative to the work support,whereby the amount of feeding surface engaging the material may beIgaried, and means for operating said feed ars.

8. The combination with a work support of a feeding mechanism, includinga feed dog inclined to said work support, in a downward direction fromfront to rear in the line of feed, means for operating said feed dog andmeans for adjustin said feed dog bodily vertically, whereby tie amountof feeding surface engaging the material, may be varied.

9. The combination with a work sup ort of a needle, a feeding mechanisminclu ing a feed dog extending from in front ofto the rear of saidneedle, said feed dog be-. ing inclined downward relative to the worksupport from front to rear in the line of feed, means for operating saidfeed dog and means for adjusting said feed do bodily vertically, wherebythe amount 0 feeding surface engaging the material may be varied.

10. A sewing machine including in combination a work support, a presserfoot, a feeding mechanism, including a feed dog, said feed dog having afeeding surface inclined downwardly and rearwardly in the line of feedrelative to said work support,

means for operating said feed dog, and "means for adjusting said feed dobodily vertically, whereby the amount of eeding surface engaging thematerial may be varied.

11. A sewing machine including in combination a work support, a pivotedresser foot, of a feeding mechanism inclu 'ng a feed dog, said feed doghaving a feeding surface inclined downwardly and rearwardly relative tosaid work sup ort, means for operatin said feed dog, an means foradjusting sald feed dog bodily vertically, whereby the amount of feedingsurface engaging the material may be varied.

n testimony whereof I afiix my signature, in presence of two witnesses.

LANSING ONDERDONK.

Witnesses W. L. Swm, E. T. ALLAN.

